People are focusing on the > vs the >=, but for me the key point is being able to hold logic and variables in your mind over several iterations of a loop.

I’ve used similar tests in interviews before (a function that behaves like atoi and candidates have to figure out what it’s doing) and the good candidates are able to go over the code and hold values in their head across multiple iterations of a loop.

There are many candidates who can’t do this.